Cold adaptation does not handicap warm tolerance in the most abundant Arctic seabird
Proceedings of the Royal Society B Biological Sciences,
Год журнала:
2024,
Номер
291(2015)
Опубликована: Янв. 17, 2024
Arctic
birds
and
mammals
are
physiologically
adapted
to
survive
in
cold
environments
but
live
the
fastest
warming
region
on
planet.
They
should
therefore
be
most
threatened
by
climate
change.
We
fitted
a
phylogenetic
model
of
upper
critical
temperature
(
T
UC
)
255
bird
species
determined
that
for
dovekies
Alle
alle
;
22.4°C)—the
abundant
seabird
Arctic—is
8.8°C
lower
than
predicted
its
body
mass
(150
g)
habitat
latitude.
combined
our
comparative
analysis
with
situ
physiological
measurements
36
from
East
Greenland
forward-projections
dovekie
energy
water
expenditure
under
different
scenarios.
Based
analyses,
we
demonstrate
adaptation
this
small
does
not
handicap
acute
tolerance
air
temperatures
up
at
least
15°C
above
their
current
maximum.
predict
will
reduce
energetic
costs
thermoregulation
dovekies,
capacity
cope
rising
constrained
intake
salt
balance.
Dovekies
evolved
15
million
years
ago,
thermoregulatory
physiology
might
also
reflect
wide
range
palaeoclimates,
both
substantially
warmer
colder
present
day.
Язык: Английский
Acute impacts of biologging devices on the diving behaviour of Manx shearwaters
Animal Biotelemetry,
Год журнала:
2025,
Номер
13(1)
Опубликована: Янв. 30, 2025
Язык: Английский
Environment‐dependent relationships between corticosterone and energy expenditure during reproduction: Insights from seabirds in the context of climate change
Functional Ecology,
Год журнала:
2024,
Номер
38(10), С. 2110 - 2122
Опубликована: Авг. 13, 2024
Abstract
Alternative
hypotheses
have
been
proposed
regarding
how
the
hormone
corticosterone
(CORT)
mediates
energy
expenditure
during
reproduction.
Elevated
baseline
CORT
(CORT
b
)
could
support
daily
(DEE),
promoting
reproductive
effort
or
downregulate
costly
behaviours
in
low
quality
individuals
facing
allostatic
overload.
We
investigated
relationships
between
,
time
activity
budgets
(TABs),
DEE
and
diving
behaviour
across
2
years
colonies
of
little
auk
(
Alle
alle
),
an
Arctic
seabird
which
elevating
may
reproduction
face
climate
change.
also
explored
whether
mercury
(Hg)
contamination
might
suppress
by
affecting
hypothalamus‐pituitary–adrenal
(HPA)
axis
production.
Furthermore,
we
performed
phylogenetically
controlled
analysis
breeding
species
to
build
broader
understanding
CORT‐DEE
relationships.
positively
correlated
with
activity,
dive
duration
a
cold
year
East
Greenland,
when
was
elevated
population,
but
not
warmer
year,
at
Svalbard.
did
predict
chick
provisioning
nor
Hg
.
Across
species,
were
uncorrelated.
Rather,
contrary
predictions,
higher
lower
latitudes.
Intraspecific
results
suggest
environment‐dependent
DEE,
implications
for
's
role
change
resiliency.
Interspecific
analyses
absence
correlational
selection
reproduction,
that
thresholds
induce
changes
differ
species.
Read
free
Plain
Language
Summary
this
article
on
Journal
blog.
Язык: Английский
Migratory movements, distribution, habitat preference, and activity patterns of the endangered Abbott’s booby Papasula abbotti
Marine Ecology Progress Series,
Год журнала:
2024,
Номер
743, С. 75 - 96
Опубликована: Авг. 22, 2024
The
Abbott’s
booby
Papasula
abbotti
is
one
of
the
most
threatened
seabirds
in
world.
non-breeding
behaviour
and
distribution
boobies
are
largely
unknown
but
evidence
suggests
they
migrate
between
breeding
attempts.
This
lack
information
impedes
identification
quantification
threats
birds
exposed
to
outside
their
season.
We
studied
migratory
movements
using
geolocator-immersion
loggers.
A
total
22
adult
were
tracked
2007
2014.
Analysis
27
trips
revealed
that
migrated
on
average
2500
km
east
Christmas
Island
an
area
centred
around
Banda
Sea,
Indonesia.
timing
migration
(from
November-December
April)
coincides
with
Indonesian-Australian
monsoon,
a
period
characterised
by
reversing
prevailing
winds
decreased
regional
oceanic
primary
productivity.
birds’
matched
pattern
reversal
winds.
No
recorded
17
May
26
October,
which
whole
population
during
period.
Migrating
spent
little
time
water
day
or
at
night
(15%),
individuals
preferred
waters
narrow
range
sea
surface
salinity
(32.5-34.5
PSU),
rugged
seafloor
topography,
temperatures
above
ca.
28°C.
Overall,
these
novel
results
identify
within
potential
threats,
such
as
interactions
fisheries
effects
climate
change
species’
marine
habitats,
should
be
investigated.
Язык: Английский
Should we really predict the response of wild endotherms to climate change based on thermal responses measured in captivity?
Опубликована: Авг. 7, 2024
In
their
recent
study,
Beaman
et
al.
[1]
measured
the
metabolic
response
of
most
Язык: Английский
Mind the polar sun: Solar radiations trigger frequent heat stress in breeding king penguins, despite relatively cool air temperatures.
bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 13, 2024
Polar
and
sub-polar
animals
evolved
to
thrive
in
cold
climates
may
thus
be
particularly
vulnerable
the
rising
temperatures
associated
with
climate
change.
penguins
especially
due
their
dual
habitat,
alternating
between
foraging
waters
breeding/moulting
on
an
increasingly
warm
land.
Here,
we
characterized
heat
stress
occurrence
breeding
king
through
behavioural
observations
subcutaneous
body
temperature
measurements.
We
show
that
is
frequent
(>
20%
of
at
mid-day)
sub-Antarctic
region,
thermoregulatory
mechanisms
appear
insufficient
maintain
stable
sub-cutaneous
temperature.
Air
alone
was
a
poor
predictor
occurrence,
while
combination
high
solar
radiations,
low
wind
speed
its
best
predictor.
Importantly,
reproductive
failure
occurred
days
warmer
than
average,
suggesting
potential
significant
sublethal
effects
being
likely
affect
population
dynamics.
Язык: Английский